Dissociation of iridium(III) phosphorescent emitters upon adsorption on Cu(110) revealed by scanning tunneling microscopy

H Gersen, R Schaub, W Xu, I Stensgaard, E Laegsgaard, TR Linderoth, F Besenbacher, MdK Nazeeruddin, M Graetzel

Research output: Contribution to journalArticle (Academic Journal)peer-review

8 Citations (Scopus)

Abstract

The phosphorescent emitters used in organic light emitting diodes (OLEDs) play a crucial role for tuning the color and the luminescence intensity. The authors have investigated by scanning tunneling microscopy the adsorption of iridium(III) phosphorescent emitter molecules used in OLEDs on a partly oxidized Cu(110) surface. Surprisingly they find that 50% of the emitters have dissociated upon adsorption at the substrate. The findings suggest that the decrease in the lifetime of OLEDs, which are manufactured by vacuum vaporization technique, is due to the dissociation of emitter molecules present in the device.
Translated title of the contributionDissociation of iridium(III) phosphorescent emitters upon adsorption on Cu(110) revealed by scanning tunneling microscopy
Original languageEnglish
Pages (from-to)264102/1 - 264102/4
Number of pages3
JournalApplied Physics Letters
Volume89 (26)
DOIs
Publication statusPublished - Dec 2006

Bibliographical note

Publisher: American Institute of Physics

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